SeaKlear 90-Day Algae Prevention & Remover, 1 Qt

Reliable & Effective. 90-days no algae guarantee (when used according to instructions in balanced pool water). Kills and prevents blue-green, green, yellow and black algae. Non-foaming, non-staining (when used according to instructions in balanced pool water). 11.8% Copper Sulfate Pentahydrate; 3% Copper as elemental. Effective against blue-green, black and mustard algae. Nonstaining formula. Each treatment will last three months. Use 16 fluid ounce 10000-gallon of pool water to prevent algae growth in all pool types. For severe algae treatment use 32 fluid ounce per 10000-gallon of pool water